/**
 * OpusBike Service Worker — Cache static assets for PWA
 */

const CACHE_NAME = 'opusbike-v3';
const STATIC_ASSETS = [
    './',
    './index.html',
    './css/style.css',
    './js/boschProtocol.js',
    './js/bleService.js',
    './js/wsRelay.js',
    './js/app.js',
    './manifest.json',
    './icons/icon-192.png',
    './icons/icon-512.png',
    './icons/apple-touch-icon.png',
    './icons/favicon.svg',
    './icons/proactys-logo.png',
    './icons/qr-code.png'
];

// Install — cache static assets
self.addEventListener('install', (event) => {
    event.waitUntil(
        caches.open(CACHE_NAME)
            .then(cache => cache.addAll(STATIC_ASSETS))
            .then(() => self.skipWaiting())
    );
});

// Activate — clean old caches
self.addEventListener('activate', (event) => {
    event.waitUntil(
        caches.keys().then(keys =>
            Promise.all(
                keys.filter(key => key !== CACHE_NAME)
                    .map(key => caches.delete(key))
            )
        ).then(() => self.clients.claim())
    );
});

// Fetch — cache-first for static assets, network-first for everything else
self.addEventListener('fetch', (event) => {
    const url = new URL(event.request.url);

    // Skip WebSocket requests
    if (url.pathname.endsWith('/ws')) return;

    // Cache-first for known assets
    event.respondWith(
        caches.match(event.request)
            .then(cached => cached || fetch(event.request))
    );
});